Description: Black and white photo of thrust pumps, probably in a different location, with another type of valve next to the pump. Inscribed on the backside: "Las Plumas".
Source: 1 Page of 1: Photograph (6 3/4 x 4 7/8 in.)
Collection Title: James Moak Collection
Call Number: 1991-041-0074
Digitized by California Revealed.